∠ABC=∠CDA=72º
∠DAB=∠BCD=x
∠ABC+∠CDA+∠DAB+∠BCD=360º
Therefore:
72º+72º+x+x=360º
144º+2x=360º
2x=360º-144º
2x=216º
x=216º/2
x=108º
So, <span>∠DAB=∠BCD=x=108º
Answer: </span>∠DAB=108º (B)
OB. The digits in the millions period are 41, the digits in the thousands period are 000, and the digits in the ones period are 138.
The digits of a number can be classified into into 3 groups and each such group is called a period.
Here, we are give a number 41,000,138.
In this number, the million period consists of
ten millions - 4
and millions - 1
Hence the digits in the million periods are 41
The thousand period consists of all zeroes, hence the digits in thousand periods are 000.
The ones period contains-
hundreds - 1
tens - 3
and ones - 8
Thus, the digits in the ones period are 138
Hence, option B is the correct answer.
Learn more about place value here-
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Answer:
SUE: (18-x)-5
TONY: (18+x) / 
Sue has 18 sweets
Tony also has 18 sweets
Sue gives x sweets to Tony
Sue then eats 5 of her sweets
Tony then eats half of his sweets
(18-x)-5=(18+x)/ 1/2
x= -7.6
-1760. Just let 0 be sea level
Answer:
x2+3y
Step-by-step explanation Combine like terms y+y+y=x2 3y+x2 and the solution is x2+3y.
